Paper-stock-refining engine.



No- 806,193. -PATBNTED DEC. 5,1905.

H. G. SAEGKER. PAPER STOCK RBFINING ENGINE.

APPLICATION FILED AUG. 14, 1905.

' f UNITED STATES PATENT OFFICE.

HERMAN SAECKER, or APPLETON, WISCONSIN.

PAPER-STOCK-REFINING ENGINE.

Specification of Letters Patent. 7

Patented Dec. 5, 1905.

Application filed August 14,1905. Serial No. 274,089.

Tofall whom/iv may concern;-

Be it known that I, HERMAN G. SAEOKER, a citizen of the United States, residing at Appleton, in the'county of Outagamie and State of Wisconsin, have inventedcertain new and useful Improvements in Paper-Stock-Refining Engi-nes, of which the following isa specification, reference being had to the accompanying drawings, forminga part thereof.

This invention relates to machines of the class shown and described in United States Letters Patent No. 653,856, dated July 17, 1900, and more particularly to the construction of the conical cores and knife-retaining rings of such machines. Its main objects are to prevent the loosening and displacement of the knife-retaining. rings and of the knives held thereby, and generally to improve theconstruction-and operation of machines of this class. v c

It consists in certain novel features of con struction and in the peculiar arrangement and combination of parts,a's hereinafter described,

and defined in the claims.

In the accompanying drawings like characters designate the same parts.

Figure leis aview, partly in side elevation and partly in central longitudinal section, of the larger end of the conical core of a machine embodying the present invention; and

I Fig. 2 is a cross-section of the same on the line 2'2, Fig. 1. I

In machines of this kind it has been the customary practice to fit and shrink the knifepose of the improvements retaining rings upon the conical or tapering face of the core, and considerable trouble has been experienced when they are so fitted and secured upon thecore from their tendency to slip toward the smaller end of the core, thereby becoming loose and resulting in the loosening,'displacement, and improper working ofthe knives. To overcome this trouble and to attain the above-stated objects is the purconstituting the present invention. i

Referring to the accompanying drawings, a designates the larger end of the conical rotating core of a paperstock-refiningmachine mounted in the usual or any suitable manner on a shaft 6. At intervals in its length the said core.

core is formed,-as shown in Fig. l, with circumferential cylindrical seats 0, which are concentric and parallel with the axis of the core. Laterally grooved or recessed knife.- retaining rings d are fitted to and shrunk or bases of these rings being extended laterally or made of sufficient width to prevent the tendency of the rings'to tip sidewise when subjected to lateral strain or pressure. The grooves in said rings are preferably rounded or curved on the inner-side, as shown in Fig. l, to avoid-weakening the'bases of the rings and at the same time to permit the knives to hear at their inner edges firmly against the conical face of the core between said rings.

The knives e, which are arranged lengthwise of-and at intervals around the'core'a, with spacing-stripsf, of'wood or other suitable material between them, are notched in the ends to fit over and engage with the overhanging rims of the rings 0Z, which thus firmly secure them to and hold them in place upon The construction of the core and of the knife-retaining rings as herein shown and described effectively prevents any tendency of the rings to slip lengthwise of the core and to become loose,and thereby avoids the trouble which results from the loosening, displacement, and-improperoperation' of the knives.

I claim 1. In a paper-stock-refining engine the combination of a conical core formed circumferentially at intervals with cylindrical seats, and

laterally-recessed knife-retaining rings hav;

erally-recessed rings fitted and secured to said seats, longitudinal knives having end notches 5 5 otherwise firmly secured upon the seats 0, the 1 engaging the overhanging rims of said rings, and terminate at the conical face of the core, 10

and spacing-pieces interposed between said substantially as described. knives, substantially as described. In witness whereof I hereto aflix my signa- 4. In apaper-stoek-refining enginethe con1- ture in presence of two witnesses. "I 5 bination of a conical core formed cireumfer- 1 3 w 1 *1 r entially at intervals With cylindrical seats p'ar- HLhMAN bAEbhhR" allel With its axis, rings fitted and secured to YVitnesses: said seats and formed with lateral grooves the P. M. CONKEY,

inner sides of Which are curved or rounded M. E. GRIGNON. 

